Which of the following correctly describes the evolution of roaches who were resistant to Combat®?
a. The roach bait caused individuals that preferred the bait to evolve a dislike for it.
b. The roach bait made the population of roaches more evolved to dislike the bait.
c. The roach bait acted as a force of natural selection to create mutations that disliked the bait.
d. The roach bait caused the population to evolve by selecting against roaches that preferred the bait.
e. The roach bait evolved the roaches that liked the bait to become roaches that disliked the bait.
Ans: d. The roach bait caused the population to evolve by selecting against roaches that preferred the bait.
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The following pertain to ribosomes during protein synthesis except
A. they use their large subunit to supply enzymes for peptide bonding. B. they participate only in translation. C. they bind to the 5' end of mRNA by their small subunit. D. they contain codons within their rRNA molecules. E. they shift towards the 3' direction along the mRNA strand from one codon to the next.
Which of the following carbohydrates is the
most abundant in the biosphere?
a. glucose b. starch c. glycogen d. sucrose e. galactose
Imagine that you discover a microbial deep-sea organism that can derive energy from (inorganic) hydrogen gas (H2). However, this microbe can also synthesize organic compounds from carbon-containing inorganic molecules in the ocean. This microbe is a:
a. phototroph. b. photoautotroph. c. photoheterotroph. d. chemoheterotroph. e. chemoautotroph.
During prophase of mitosis, the
A. nucleus is preparing for the beginning stage of mitosis that will follow. B. chromosomes are so loosely coiled and stretched out that they are not yet visible. C. nucleoli and nuclear membrane disappear. D. zygote is formed.